If I download a PDF in Chrome (even from Drive), on any platform, and click on the downloaded-file-button down the bottom, the PDF opens in Chrome in a viewer that includes a table of contents browser, smart zoom controls and other features.
If, on the other hand, I double click on it in Drive, it opens in Chrome but in a preview style viewer that is very limited, with none of the features above.
How do I get Chrome to open PDFs from Drive... well, in Chrome?